Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "Delete the ERROR log when it is not https"
  - Delete the ERROR log when it is not https

    JIRA: DOVETAIL-462

    1. If it is not https, Dovetail will give a error log
       2017-07-13 21:58:30,409 - container.Container - ERROR - The command
       'openstack catalog show identity |awk '/public/ {print $4}'| grep 'https'' failed.
    2. Remove this error log becuase it is not an error.

    Change-Id: I5791b1925cad8606d70eefd4940dd9bf46956305
    Signed-off-by: xudan <xudan16@huawei.com>